Centering device



May 8, 1962 Filed Jan. 5, 1960 P. HRYCENKO CENTERING DEVICE Fig.

2 Sheets-Sheet 1 r Peter Hrycen/ro INVENTOR.

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May 8, 1962 P. HRYCENKO CENTERING DEVICE 2 Sheets-Sheet 2 Filed Jan. 5,1960 Peter Hrycen/ro ZN VENTOR.

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Uited States Patent O 3,032,885 CENTERING DEVICE Peter Hrycenko, 86Marcella St., Boston, Mass. Filed Jan. 5, 1960, Ser. No. 568 6 Claims.(Cl. 33-185 The present invention generally relates to a centeringdevice and more particularly to a device for use in conjunction withvarious machine tools and the like for indicating the relationship ofthe tool to the work whereby the tool may be set in a predeterminedangular relation to the work or centered in relation to the workdepending upon the nature of the tool and the operation to be carriedout by the tool.

The primary object of the present invention is to provide a centeringdevice for use in conjunction with machine tools especially such'as areemployed in lathes and the like for indicating the relationship of thetool and the work so that this relationship may be set at a desiredorientation depending upon the particular operation of the tool on thework.

Another object of the present invention is to provide a centering devicein accordance with the preceding object in which the centering devicebasically incorporates two components with one component beingcounterweighted and the other component pivotally supporting thecounterweighted component and adapted to be received between the tooland the work whereby the supporting component will be disposedsubstantially tangential to the work or perpendicular to the line offorce exerted by the tool whereby the counterweighted component willindicate the angular relationship of the tool and the work by indiciacarried by the pivotal counterweighted component.

A further object of the present invention is to provide a centeringdevice which is extremely simple in construction, easy to use,relatively accurate and relatively inexpensive to manufacture.

These together with other objects and advantages which will becomesubsequently apparent reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming a part hereof, whereinlike numerals refer to like parts throughout, and in which:

FIGURE 1 is an enlarged front elevational view of the centering deviceof the present invention;

FIGURE 2 is a side elevational view of the centering device of thepresent invention;

FIGURE 3 is a detail sectional view taken substan tially upon a planepassing along section line 3-3 of FIGURE 1 illustrating furtherstructural details of the invention;

FIGURE 4 is a detailed sectional view taken substantially upon a planepassing along section line 4-4 of FIGURE 2 also illustrating furtherstructural details of the device;

FIGURE 5 illustrates the centering device of the present invention inuse for indicating the tool as being set by degrees above the centerline or zero degree mark for turning work on an outside diameter; and

FIGURE 6 illustrates the manner of use of the invention for indicatingthe tool set at the center line or zero degrees for use in boring aninside diameter in the work.

Referring now specifically to the drawings, the numeral 10 generallydesignates the centering device of the present invention which includesan elongated generally rectangular plate or body 12 having parallelsurfaces, parallel end edges and parallel side edges. Adjacent the upperend of the plate or body 12 there is provided a relatively narrowlongitudinal slot 14 and a relatively wider longitudinal slot 16communicating with the lower end of the narrow slot 14.

Mounted and disposed within the slots 14 and 16 is a 3,032,885 PatentedMay 8, 1962 pivotal indicator plate member 18 having a generallycircular lower end portion 20 and a reduced neck portion 22 and anarcuate upper end portion 24 having a graduated scale and numericalindicia 26 thereon with the graduating scale having a zero mark at thecenter and being graduated from zero to ten or fifteen degrees in bothdirections from the center. The center of the plate member 18 isprovided with a bearing pin 28 having conical end portions 30 receivedin bushings or bearings 31 that are disposed in sockets 33 in theelongated plate 12. Also, the lower end of the circular portion 20 isprovided with an arcuate notch 32 defined by ends engageable with theplate 12 to limit the pivotal movement of the plate member 18. Alsomounted on the pin 28 is a generally U-shaped counter-weight 34 having abight portion 36 extending under the rounded end 20 and being disposedin the notch 32 as illustrated in FIGURE 3.

In use of the present invention, the plate or body 12 is disposedbetween the tool 38' and work 40. When pressure is applied against thetool 38 towards the work 40, the plate or body 12 will be angulated asillustrated in FIGURE 5 while the weight 34 maintains the indicatorplate 18 vertical so that the angle of inclination of plate 12 may beread on the graduated scale 26. This will indicate the orientation ofthe tool 38 in relation to the center line of the work 40 andspecifically indicate this orientation in degrees above or below thecenter line of the work.

FIGURE 6 illustrates a similar arrangement in which the centering deviceis disposed between a tool 42 and work 44 in which the tool 42 isaligned with the center line of the work or in zero degrees relationshipthereto whereby the centering device will indicate the center line andthe relationship thereof to the tool 42. Of course, the device may beused with various types of tools including lathe tools or the like fororientating the tool in the proper relation to the center line orgauging the tool to see if it is properly set in relation to the work'The foregoing is considered as illustrative only of the principles ofthe invention. Further, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction and operation shown anddescribed, and accordingly all suitable modifications and equivalentsmay be resorted to, falling within the scope of the invention asclaimed.

What is claimed as new is as follows:

1. A centering device for determining the relationship between work anda tool approaching the work comprising an elongated plate adapted to bereceived between the tool and the work for orientation in perpendicularrelation to the line of opposing contact between a tool and its work,said plate having a slot therein adjacent one end thereof, a weightedindicator plate member pivotally mounted on said plate and disposed insaid slot for swinging movement in a plane substantially normal to saidplate under the influence of gravity, and a graduated scale on saidindicator plate member for indicating the position of the indicatorplate member relative to the elongated plate thereby indicating theangular relation of the plate and the degrees above the horizontalcenter line of the tool in relation to the work.

2. The structure as defined in claim 1 wherein said indicator platemember is provided with a transversely extending tapered pin havinggenerally conical outer ends, bearing means mounted on said plate forpivotally supporting the indicator plate member.

3. The structure as defined in claim 2 wherein said indicator platemember is provided with an arcuate notch in the lower end edges thereof,said notch being defined by end walls for engaging opposite surfaces ofthe plate at the lower end of the slot thereby limiting the pivotalmovement of the indicator plate member.

4. The structure as defined in claim 3 wherein said indicator plat-emember is provided with a U-shaped weight engaging the lower end thereofand supported from the support for the indicator plate member.

5. For use in combination with a tool and work, a device for indicatingthe position of the tool relative to the center line of the work, saiddevice comprising an elongated plate received between the tool' and thework whereby application of force on the plate by the tool wiilorientate the plate in perpendicular relation to the line of opposingcontacts between the tool and the work, said plate having parallelsurfaces, an indicator plate member pivotally mounted on said plate forpivotal movement about an axis parallel to the parallel surfaces of theplate, said indicator plate member being disposed in perpendicularrelation to the plate and including an arcuate end edge disposedadjacent the plate, said arcuate end edge including a graduated scalefor indicating the angular position of the indicator plate member inrelation to the plate, said plate member including weight meansconnected thereto for maintainingthe longitudinal axis of the platemember vertical whereby angular inclination of the plate may bedetermined by observing the relationship of the graduated scale on theplate member to the surfaces of the plate.

6. The structure as defined in' claim 5 wherein said plate memberisprovided with a notch inthe lower edge thereof receiving a portion ofthe plate therein whereby the end edges of the notch will contactopposite surfaces of the plate for limiting the pivotal movement of theplate member inrelation to the plate.

References Cited in the file of this patent UNITED STATES PATENTS371,294 wOOdS Oct'. 11, 1387 773,756 M11161 DEC. 27, 1904 2,542,938Morris Feb. 20, 1951 2,580,601 Rouse Jan. 1, 1952 2,609,616 MuellerSept. 9, 1952 2,567,703 Zumkeller Feb. 2, 1954

